.a{

            background-color:#F5F5F5;

            color: #ffffff;
            width: 1500px;
            height: 30px;
            margin: auto;
            position: absolute;
            left: 50%;
            top: 15px;
            transform: translate(-50%,-50%);

}
.a1{
	color: black;
	width: 100px;
	height: 30px;
	margin-right:20px ;
	float:right ;
	color: whiteh;
	text-align: center;
    line-height: 30px;


}

.a2{

	width: 30px;
	height: 30px;
	margin-right:20px ;
	float:right ;
}

.b{


            color: #ffffff;
            width: 1500px;
            height: 100px;
            margin: auto;
            position: absolute;
            left: 50%;
            top: 9%;
            transform: translate(-50%,-50%);

}
.b1{
	width: 239px;
	height: 60px;
	margin-left:20px ;
	margin-top: 20px;
	float:left ;
}
.b2{
	width: 239px;
	height: 60px;
	margin-right:20px ;
	float:right ;
	margin-top: -50px;
}

.c{


            color: #ffffff;
            width: 1500px;
            height: 40px;
            margin: auto;
            position: absolute;
            left: 50%;
            top: 150px;
            transform: translate(-50%,-50%);
}
.c1{
	background-color:#ffffff;
	height: 40px;
	width: 294px;
	float:left ;
	margin-left: 5px;
	color: black;
	line-height: 40px;
	text-align: center;
	font-size: 20px;
	text-decoration: none;
}



div .c1:hover{background-color: 	#73BF00;}